糖萜素对绿壳蛋鸡生产性能的影响

通过饲养实验,探讨了糖萜素对绿壳蛋鸡采食量、产蛋率、蛋重、发病率和经济效益的影响.对绿壳蛋鸡饲喂含糖萜素600mg/kg的日粮,结果表明,绿壳蛋鸡采食量下降了2.41%(P＞0.05),产蛋率提高了7.9%(P＜0.01),蛋重提高了2.1%(P＜0.01),料蛋比降低了11.4%,综合经济效益提高了12.0%,鸡群的健康状况显著改善,发病率由3.0%降低到0.     

糖萜素对提高蛋鸡生产性能的作用

本文主要研究在蛋鸡产蛋期的饲料中分两个阶段添加不同浓度的糖萜素，经过364d的饲养试验表明，糖萜素对提高蛋鸡的生产性能有显著的作用，与对照组相比，试验组少死亡鸡145只（P＜0．01）；产蛋率提高1．78％（P＜0．05），多产蛋1729．9kg，减少饲料消耗224．6kg，饲料报酬提高2．6％，平均每只鸡增加盈利1．65元。     

添加稀土对蛋鸡生产性能影响的研究

蛋鸡饲粮中添加300mg/kg、400mg/kg的有机稀土络合物，观察其对蛋鸡产蛋率、平均蛋重、采食量等的影响。结果表明：添加稀土能显著提高产蛋率，两试验组分别比对照组高出3.54和6.18个百分点；而对蛋重、采食量影响不大。     

不同工艺仙人掌提取物对绿壳蛋鸡生产性能及部分免疫指标的影响

为研究不同工艺仙人掌提取物对绿壳蛋鸡生产性能的影响,选取7 260只40周龄绿壳蛋鸡,随机分为3组(处理Ⅰ组、处理Ⅱ组和对照组)。对照组饲喂基础饲粮,处理Ⅰ组在基础饲粮中添加乙醇提取配合乙醚萃取的仙人掌提取物400mg/kg,处理Ⅱ组,在基础饲粮中添加超临界萃取的仙人掌提取物400mg/kg,结果表明:添加了不同工艺仙人掌提取物的处理组在产蛋率、平均蛋重、破壳蛋和绿壳蛋鸡外周血T淋巴细胞转化率上与对照组相比得到明显的改善(P0.05),处理Ⅰ组和处理Ⅱ组的料蛋比和对照组相比降低了6.33%~2.26%,差异不显著(P0.05);处理Ⅰ组和处理Ⅱ组在产蛋率、平均蛋重、破壳蛋和绿壳蛋鸡外周血T淋巴细胞转化率上差异不显著(P0.05)。因此,不同工艺仙人掌提取物饲喂绿壳蛋鸡均能改善蛋品质。     

添加稀土对蛋鸡生产性能影响的研究

蛋鸡饲粮中添加300×10-6、400×10-6的有机稀土络合物,观察其对蛋鸡产蛋率、平均蛋重、采食量等的影响.结果表明;添加稀土能显著提高产蛋率,两试验组分别比对照组高出3.54和6.18个百分点;而对蛋重、采食量则影响不大.     

中药复方制剂对绿壳蛋鸡生产性能的影响

为研究中药复方制剂对绿壳蛋鸡生产性能的影响,选取笼养绿壳蛋鸡4 000只,随机分为4组,每组2个重复.对照组饲喂基础日粮,试验组饲喂的日粮分别在基础日粮上添加中药复方制剂1.5 g/kg、1 g/kg与0.5 g/kg.结果表明:中药复方制剂具有提高产蛋率、降低料蛋比的作用,同时还可以大幅度降低不合格蛋数量.     

糖萜素对肉用种鸡生产性能的影响

糖萜素是从植物中提取的纯天然活性物质 ,具有提高动物机体免疫能力 ,消除自由基 ,抗氧化、调节 CAMP/ CGMP系统 ,促进蛋白质合成等作用 ,能明显提高畜禽的生产性能 ,改善畜禽品质和抗应激作用。现将糖萜素对肉用种鸡生产性能的影响试验结果报告如下。1　材料与方法1 .1　试验鸡选择　试验选用同幢鸡舍 4 0周龄的 AA种鸡 1 0 0 0羽 ,随机分为 2组 ,每组50 0羽 ,试验期 2个月。1 .2　试验处理　试验分 2组 ,试验组和对照组 ,基础日粮相同 ,配方见表 1。试验组中每1 0 0 0 kg饲料添加糖萜素 50 0 g。表 1　基础日粮组成与营养水平原　料配…     

EM制剂对绿壳蛋鸡生产性能影响的研究

本文探讨了EM制剂对绿壳蛋鸡的生产性能的影响。把400只372日龄绿壳蛋鸡随机分为两组,试验组日粮中添加3‰EM制剂。观测EM对蛋鸡生产性能的影响。结果表明:EM制剂能提高饲料报酬20.92%(p<0.01),产蛋率11.03%(p<0.01),控制了有害气体的产生,增强鸡对疾病的抵抗力,死淘率降低2.5%,综合经济效益提高22.16%。     

麻城绿壳蛋鸡的生产性能

麻城绿壳蛋鸡是湖北省新发现产绿壳鸡蛋的蛋用型鸡遗传资源。原产于湖北省麻城市,主要分布于麻城市及周边的大别山地区的山区乡村。该品种2002年经湖北省畜禽品种审定委员会审核确定为“麻城绿壳蛋鸡”,首次载入《湖北省家畜家禽品种志》,并于2011年通过了国家畜禽遗传资源委员会的鉴定,入选《国家畜禽遗传资源品种目录》。     

和美酵素对矮小型蛋鸡生产性能的影响

摘要:用四种饲料在冬季饲喂矮小型蛋鸡,A组为对照组(基础日粮),B组日粮是基础日粮添加0.5%油脂和500g/T和美酵素,C组日粮是基础日粮添加1.4%油脂,D组日粮是在基础日粮基础上加500g/T和美酵素,试验期11周。结果表明:添加500g/T和美酵素的D组产蛋率最高(77.7%),和其他三个组差异达到显著水平(P<0.05),试验期料蛋比2.21∶1,每只鸡毛利3.52元,比对照组和加油组分别提高0.45元和0.79元;同时结果还发现,和美酵素和油脂同时使用效果不好。     

复合酶制剂对产蛋鸡生产性能的影响

当前,酶制剂作为饲料添加剂已引起世界畜牧业的普遍重视和广泛应用,其应用范围从最初的鸡、猪等单胃动物推广到反刍动物和水产养殖生产中。目前美国、芬兰、瑞典等欧美国家90%以上的饲料中都添加了酶制剂。当前的酶制剂种类已从单一的酶制剂向复合酶制剂发展,酶制剂已成为当今乃至将来畜牧业生产中不可缺少的一类重要饲料添加剂。复合酶制剂是由多种消化酶组合而成,对提高饲料消化率和降低饲料成本有独特功效。为验证复合酶制剂在蛋鸡饲料中添加的饲养效果,特设计本试验,以供参考。     

The performance of laying hens fed on rearing and laying diets containing urea

In an experiment using 2880 light hybrid pullets the effect of urea on laying performance has been assessed. Birds received one of three low‐protein rearing diets from 7–20 weeks of age. The control rearing diet, containing 11.5% crude protein, was compared with two diets containing 13.2% crude protein, one in which the protein was from conventional sources and the other containing 11.5% conventional protein and urea equivalent to 1.7% crude protein. At 20 weeks birds were allocated to one of two laying diets formulated to meet essential amino acid requirements. Half the birds from each rearing treatment received a low‐protein diet (14.7%) and the remaining birds received a 16.4% protein diet which included urea equivalent to 1.7% crude protein. Laying performance was recorded for the next 30 weeks.

Body weights of birds fed on the urea‐containing rearing diet were similar to those of birds fed on the control diet (1.22 kg) and less than those on the 13.2% protein diet (1.29 kg). Urea in the laying diet caused a 2% increase in egg production and tended to cause an improved food conversion efficiency. In contrast, a 3.5% less efficient food conversion was found during laying in birds which had received urea during rearing, compared with birds which had received the low‐protein rearing diet. Birds receiving the 13.2% protein diet, containing no urea, during rearing laid smaller eggs than birds fed on the 11.2% protein rearing diet. A high mortality rate occurred during laying due to lymphoid leucosis but no differences between treatments were found.     

The effect of 2,4-dichlorophenoxyacetic acid on laying hens

Laying hens were fed 2,4‐D, a herbicide, at a rate equivalent to 50 and 150 mg/kg diet from age 28 to 48 weeks. No adverse effects of the treatments were observed upon rate of egg production, egg or yolk weight, egg shell thickness, hatchability or growth rate of the progeny.     

合生素对蛋鸡生产性能的影响

选择49周龄海兰褐蛋鸡1275只,随机分成5组,设3个正对照组、1个负对照组和1个试验组。试验组饲喂负对照组日粮（未加微生态制剂）基础中添加0．05％合生素,3个正对照组分别饲喂负对照组日粮基础中依次添加其他微生态产品M100、NW和GEK（营养标准相对负对照组低6％蛋白）的日粮。预试期30d,试验期30d,考察不同添加剂产品对蛋鸡生产性能的影响。结果表明,合生素添加组与M100添加组、负对照组、NW添加组和GEK添加组的生产性能相比．产蛋率分别提高4．82％、1．01％、1．78％和5．55％;蛋质量分别提高2．79％、3．77％、2．61％和3．82％。统计上均差异显著。合生素添加组和正负对照组的料蛋比分别是2．331、2．471、2．369、2、400和2．441。鸡蛋的平均合格率统计上均无显著差异。这表明,饲料中添加0．05％合生素可达到较理想的效果。     

产蛋鸡不同蛋白质营养标准的效果

试验用白菜航杂种鸡,在赖氨酸水平固定不变的情况下,我们研究了不同饲养阶段不同蛋白质水平对鸡的产蛋性能、饲料利用率和蛋白质的影响。试验结果:产蛋各期喂给15%-14%-14%蛋白质的Ⅲ组鸡在产蛋的一阶段,其产蛋率最高(75.5%),饲料和蛋白质的利用率最好,即每天每只鸡消耗饲料和蛋白质为112.20 g和16.75 g。     

Effect of dietary fibre on the performance of laying hens

1. In tests to determine whether gizzard weight could be influenced by dietary fibre concentrations, caged layers were fed on diets containing 15, 30 or 60 g pine shavings/kg diet.

2. As dietary fibre content increased, gizzard weight increased, but there was no effect on body weight, hen‐day production, egg weight, efficiency of food conversion, mortality, percentage of liver ether extract or egg shell breaking strength. Percentage of body ether extract tended to be lower when pine shavings were fed.     

The effect of rapeseed meal on the energy metabolism of laying hens

1. The effect of 100 g rapeseed meal (RSM)/kg diet on the energy metabolism of hybrid laying hens was examined by indirect calorimetry. Thyroid hormone concentrations, thyroid weight, liver weight and body weight, egg production and food intake were also measured. 2. Fasting heat production was significantly lower in hens receiving RSM than in controls, but this difference disappeared when the birds were fed. 3. Thyroid hormone concentrations decreased, while thyroid and liver weights increased slightly; none of these effects was significant. Body weight, egg production and food intake were unaffected and no liver haemorrhages were noted. 4. The maintenance metabolisable energy (ME) requirement of control and treated birds, estimated from short-term energy balance measurements, was 474 kJ/kg0.75 d; net availability of ME in both treatments was 0.85.     

酶制剂对产蛋鸡生产性能的影响

本试验选用体重一致、健康的22周龄海兰灰蛋鸡288只,随机分成4个组,每组3个重复,每个重复24只鸡。对照组饲以基础日粮,试验组1、2、3在对照组日粮(基础日粮)的基础上分别添加酶制剂150、250、350mg/kg。经过5周的试验期,结果表明:与对照组相比,试验组1、2、3对提高蛋鸡产蛋率有不同程度的效果,试验各组平均采食量与对照组比较稍有降低,料蛋比与对照组比较稍有降低,净利润均有所增加。     

甪里艾叶粉对蛋鸡产蛋性能与蛋品质的影响

为了研究甪里艾叶粉对蛋鸡产蛋性能与蛋品质的影响,试验选用50周龄健康状况良好、生产性能相近的海兰褐蛋鸡288只,随机分为四组,一个对照组,三个试验组,各组甪里艾叶粉分别添加0、1%、2%、3%,每组6个重复,每个重复12只鸡,预试期为7 d,试验时间为42 d。结果显示:(1)甪里艾叶粉对产蛋性能的影响:试验各组的平均日产蛋重均高于对照组(P0.05),分别提高了2.62%、3.58%、2.41%;随着艾叶粉添加量的增加,平均日采食量显著减少(P0.05),分别减少了2.76%、3.29%、3.62%;试验各组料重比均显著低于对照组(P0.05),分别降低了5.10%、6.63%、5.61%;随着甪里艾叶粉添加量的增加,产蛋率分别提高了2.85%(P0.05)、3.99%(P0.01)、5.93%(P0.01)。试验各组的蛋重与对照组均无显著差异(P0.05)。(2)甪里艾叶粉对蛋品质的影响:甪里艾叶粉可显著提高蛋的比重(P0.05),其中添加量为2%时差异极显著(P0.01)。各组间的蛋形指数、哈氏单位、蛋黄颜色差异均不显著(P0.05)。但试验各组的蛋白高度分别提高了8.92%(P0.05)、11.29%(P0.05)、10.21%(P0.05),哈氏单位则相应提高了4.51%、5.67%、5.69%。各组间的蛋壳指标差异不显著(P0.05)。试验各组的蛋白比率、蛋黄比率差异不显著(P0.05),随着甪里艾叶粉添加量的增加,蛋壳比率逐渐降低,其中添加2%和3%的甪里艾叶粉可显著降低蛋壳比率(P0.05)。甪里艾叶粉可以改善海兰褐蛋鸡的产蛋性能,蛋的比重和蛋白高度显著提高,蛋壳比率呈降低的趋势。